Chaeles d



` (N5 Model.)

C. D. WELLS & C. A. NEWLIN.

WRENCH.

'Patented Sept. 25, 1883.

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i wrench, parts being cut away and vdrawn inV UNITED ASTATES PATENT OFFICE.

CHARLES D. WELLS AND CHARLES NEWLIN, OF MILLVILLE, N. J.

WRENCH.

SPECIFICATION forming part of Letters Patent No. 285,449, dated. September 25,1883.'

Application lcd October 13, 1882. (No model.)

To all whom, t may concern:

Be it known that we, CHARLES D. WnLLs* -gage a series of notches on the main bar to effect the coarse adjustment. These objects we attain by means of the mechanism shown in the accompanying drawings, in which- Figure l" shows a side view of the whole section to better expose the working parts. Figs. 2, 3, and 4' show enlarged details of the movable parts. i

A is the main bar of the' wrench, its upper surface provided with a d series of toothed notches, B.4 C is the sliding jaw, D, the slide carrying the pawl E.

VA spiral spring, F, under the thumb end of the pawl keeps its point always in contact withthe main bar. vThe jaw C and slide D are connected by a screw, G, which is provided with a head, which is inserted in the recess I of the jaw C, and there held by a set-screw engaging the annular groove shown at K,

Fig. 4, and threaded in the slide D. The screw has also a thumb-piece, H, by which it is operated. l

I, Fig. 2, shows the recess for the head of the connecting thumb-screw G, and M, Fig. 3, the hole for the threaded end. L, Fig. 3, Shows the recess for thepawl E.

The operation of this device is as follows: 4o To open the wrench the thumb is placed on the pawl E, which is thereby raised out of the notches B, and the slide with the jaw C is drawn back instantaneously as far as necessary. In closing the wrench on anutthe slide 4 5 is simply pushed forward till the jaws meet on the nut, or as nearly so as the pawl and teeth will permit. If, however, the jaws do not quite take hold, the thumb-screw H is turned and the jaw C pushed forward or re- 5o tracted, as may be necessary, till the desired grip is obtained. The whole action is simple and effective. l

We are aware of patent to McDonald, No. 47,067, March 28,1865, and of the formation and operation of his device, and we disclaim, broadly, such construction.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent, is- 6o The combination of jaw C, formed as shown, recessed to receive the head of the screw G, the thumb-screw G, provided with shouldered head adapted to work in the recess I of the jaw C, the sliding frame D, provided with the lrecess L, adapted to receive the pawl and spring, and threaded to receive the threaded `end of the thumb-screw G, the pawl E, and

spiral spring F, with the main bar B, formed and notched as shown and described.

CHARLES D. WELLS. CHARLES A. NEWLIN.

Witnesses:

RnBnccA M. WnLLs, ELLA MAUD RETTIT. 

